74AC138SJX

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC138SJX is a high-speed 1-of-8 decoder/demultiplexer belonging to the 74AC logic family. It accepts three binary weighted address inputs (A0, A1, A2) and provides eight mutually exclusive active-low outputs (O0-O7). The device operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature range from -40°C to +85°C. It features multiple input enables for parallel expansion capabilities.

Signal Switches, Multiplexers, Decoders Feature Summary

• Demultiplexing capability allows use as an 8-output demultiplexer by utilizing enable inputs as data or strobes.
• Multiple input enables facilitate easy parallel expansion to larger decoding configurations using minimal additional components.
• Outputs are active-low and mutually exclusive, ensuring only one output is active at any given time when enabled.

Signal Switches, Multiplexers, Decoders Applications

• High-speed bipolar memory chip select address decoding
• Parallel expansion to 1-of-24 or 1-of-32 decoders
• System address decoding in digital circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and shipping configuration. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer, as availability may vary by region and production cycle.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring high-speed decoding within the 74AC family specifications. Ensure the design accommodates the required supply voltage range and that the SOP-16 package fits the PCB layout constraints. Verify input voltage levels match the AC series thresholds for reliable operation.

Signal Switches, Multiplexers, Decoders Part Context

This part is part of the broader 74AC138 family, which includes variants like the 74ACT138 offering TTL-compatible inputs. While sharing the same logical function, the ACT variant differs in electrical characteristics and input thresholds. The SJX suffix typically denotes a specific tape-and-reel packaging format for surface-mount assembly.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74AC138SCX is a verified alternative from onsemi in the same SOIC-16 package. Other compatible devices include the 74ACT138SCX for TTL-compatible applications. Always verify pinout compatibility and electrical parameters before substitution.